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A 25-75 GHz compact double balanced frequency doubler fabricated in standard 0.18-mum CMOS process is demonstrated. The resistive doubler is composed of two identical asymmetric broadside-coupled baluns, and a quad GS-connected diode. The fabricated doubler achieves a radio frequency bandwidth from 25 to 75 GHz with a maximum output power better than +3 dBm; the fundamental signal rejection is ranging...
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